FRMLS_SPECCOMP is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Structure: Specifications, Compositions" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_FRMLS_SPECCOMP TYPE FRMLS_SPECCOMP.
The FRMLS_SPECCOMP table consists of various fields, each holding specific information or linking keys about Structure: Specifications, Compositions data available in SAP. These include SUBRECN (RMS-FRM: Object Identifier), ROLE (Component Type (Material, Substance, or Stream Item)), COMPTGT_FLT (Floating Point Value), UNIT (Unit of Measure of a Material or Substance Item)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .